Question

From the list given below, select the word(s) required to complete the blanks (i) to (v) in the following passage:

Note : words chosen from the list are to be used only once. Write only the answers. Do not copy the passage.

[reddish brown, ammonium, nitrogen dioxide, hydroxyl, dirty green, ammonia, acidic, alkaline]
Nitrogen and hydrogen combine in the presence of a catalyst to give (i) ______ gas. When the above mentioned gas is passed through water it forms a solution which will be (ii) ______ in nature and the solution contains (iii) ______ ions and (iv) ______ ions. The above solution when added to iron (II) sulphate solution gives a (v) ______ coloured precipitate of iron (II) hydroxide.

Complete the blanks (i) to (v) in the passage given, using the following words.

[Ammonium, reddish brown, hydroxyl, nitrogen dioxide, ammonia, dirty green, alkaline, acidic]

In the presence of a catalyst nitrogen and hydrogen combine to give (i) ______ gas. When the same gas is passed through water it forms a solution, which will be (ii) ______ in nature, and will contain the ions (iii) ______ and (iv) ______. A (v) ______ coloured precipitate of iron [II] hydroxide is formed when the above solution is added to iron [II] sulphate solution.

Answer 1

(i) Ammonia
(ii) Alkaline
(iii) Ammonium
(iv) Hydroxyl
(v) Dirty green

Answer 2

In the presence of a catalyst nitrogen and hydrogen combine to give ammonia gas. When the same gas is passed through water it forms a solution, which will be alkaline in nature, and will contain the ions ammonium and hydroxyl. A dirty green coloured precipitate of iron [II] hydroxide is formed when the above solution is added to iron [II] sulphate solution.